A sandwich construction gives you better specific stiffness for the part it does not help with impact resistance. You want the strongest construction at the areas where you are moving around on the board, only a thicker skin is effective here.BWD wrote:Stitch through idea or many stringers might be too heavy and stiff for sup I think. I would just do a sandwich deck of 2-3mm high density foam (corecell or d-cell etc) or thin okume plywood, veneer etc.
Frederiks idea is correct in a way but only partly.
Its right mainly IF he means having a sandwich deck AND sandwich bottom. But many board builders have known for many years a sandwich deck helps against impact and heel dents.
By making the laminate thicker it is stiffer and resists impact. The recipe is different to maximize stiffness and light weight.
For example:
stiff and light = eps core, 2 oz glass, core cell, then 4-6oz glass on top. This sandwich can wrap the rails and deck
Impact resistant = eps core, 4-6 oz glass, THIN corecell or ply or veneer ( or even just a thick hot coat), then 6-8 oz glass on top.
Or you can just add a few glass layers on deck!
FrederikS wrote:I understood it as if the #0 already has a SUP which works and wants to upgrade it to kiteboard use..............
Fred you are DEAD WRONG, both in theory and practice,FrederikS wrote: A sandwich construction gives you better specific stiffness for the part it does not help with impact resistance. You want the strongest construction at the areas where you are moving around on the board, only a thicker skin is effective here.
http://en.wikipedia.org/wiki/Sandwich-s ... _composite
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